Plotting the same distribution function in two different ways return two different graphs

Hello,

I use the following code to plot a CDF (FvR)

% Plot the estimated and actual distribution functions.
figure;
set(gcf,'DefaultLineLineWidth',1.25)
vR = sort(vR);
FvR = sort(FvR);
plot([vR(1);vR],[0 FvR],':');
hold on
set(gca,'LineWidth',1.25)
legend('Single-Index-Estimated CDF',4)
axis ([0.5 max(vR) 0 1])

and I get the following graph

while when I use

plot(FvR)

I get:

The two graphs are very different. I believe that the only real difference in the code is that in the first one I declared both axis, so I don't understand why I have two distributions that look so different.

Thank you!

Answer 1

[Jon]

In your first plot, you are plotting using the following code:

plot([vR(1);vR],[0 FvR],':');

In your second plot, you are (effectively) plotting using the following code:

plot(1:length(FvR),FvR)

The x-axes are different, hence the different plots.